We look at the division of 276420 by 80 
The aim is to understand the frequency of 80 in 276420.

Step 1:
If we divide 2 by 80, we get 0 and a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Grab the next digit (7) from the dividend, add it to 2, then carry on: 27 / 80

Step 2:
When dividing 27 by 80, we get 0 with a remainder of 27.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 27, we get 27.
Append the next digit (6) from the dividend to 27 and continue with: 276 / 80

Moving on to step 3:
80 goes into 276 3 times with a remainder of 36.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtract 240 from 276 to get 36.
Include the next digit (4) from the dividend after 36, then repeat: 364 / 80

Step 4:
364 divided by 80 is 4 with a remainder of 44.
Put 4 as the next digit of the answer. 
Result so far: 34.0
If we subtract 320 from 364, we get 44.
Bring next digit (2) of the dividend behind the 44 and repeat the process: 442 / 80

Step 5:
The number 80 fits into 442 5 times, leaving a remainder of 42.
The number 5 becomes the next digit in our result. 
Result so far: 345.0
The remainder is 42 after subtracting 400 from 442.
Fetch the next digit (0) from the dividend, attach it to 42 and continue: 420 / 80

Let's proceed to step 6:
80 goes into 420 5 times with a remainder of 20.
Write down 5 as next digit of the result. 
Result so far: 3455.0
Deduct 400 from 420 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 7:
The number 80 fits into 200 2 times, leaving a remainder of 40.
The number 2 becomes the next digit in our result. 
Result so far: 3455.2
The remainder is 40 after subtracting 160 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 8:
80 goes into 400 5 times with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 3455.25
Deduct 400 from 400 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 9:
When dividing 0 by 80, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 3455.25
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 10:
80 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 3455.25
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 3455.25 and a remainder of 0.0.